Arthur (Nigel Terry) is a legendary hero destined to be king. Wielding the mythical sword Excalibur, Arthur must rely on the counsel of the wise wizard Merlin (Nicol Williamson) to protect him against the force of his evil sister, Morgana (Helen Mirren), and their wicked son, Mordred (Robert Addie), born of incest and magic. Directed by John Boorman. With Gabriel Byrne, Nicholas Clay, Paul Geoffrey, Patrick Stewart and Liam Neeson. Categories: Adventure, Fantasy. Year: 1981.

Nigel Terry and Nicol Williamson in Excalibur

Nigel Terry in Excalibur

Nicol Williamson in Excalibur

Robert Addie in Excalibur
Helen Mirren also appeared in The Queen, National Treasure: Book of Secrets, Inkheart, State of Play, and Raising Helen.
Gabriel Byrne also appeared in The Usual Suspects, Enemy of the State, Miller's Crossing, Jindabyne, and Little Women.
John Boorman also appeared in Deliverance.
Liam Neeson also appeared in Batman Begins, Kingdom of Heaven, Gangs of New York, Breakfast on Pluto, Schindler's List, Star Wars: Episode I - The Phantom Menace, The Chronicles of Narnia: The Lion, the Witch and the Wardrobe, Les Miserables, The Chronicles of Narnia: Prince Caspian, and Taken.
Patrick Stewart also appeared in Steamboy, Jimmy Neutron: Boy Genius, Dune, X-Men: The Last Stand, and The Invention of Lying.